I think you'd better build a test environment and try it out. We have a experience in upgrading the 1.4.9 to 1.7.4 and encounter some problems. 在 2012-12-12，上午6:25，Alejandro Comisario <alejandro.comisario at mercadolibre.com> 写道： > Hi guys, we are planning to upgrade our production cluster from 1.4.8 to 1.7.4 to have the several features of the new version. > One of the main doubts before dive into this task is as follow : > > Is it possible to use SWIFT 1.7.4 with Keystone/ESSEX ? Or is MUST to have Keystone from Folsom release ? > > Thanks in advance ! > > > Alejandrito > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack at lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp